This just happened to me last weekend. I just got finished with college and was at home for a few days. I am 21 and my little brother is 17. We were the only ones home because our parents went to a movie. It was about 7:00 pm. I asked my brother, 'Do you want to go for a swim?'
He said, 'Yes.' I went to look for swimming trunks, but I couldn't find any. When I told my little brother, he said, 'That's OK. We have seen each other naked before. Let's go skinny-dipping. I said sure. But the last time I had seen him naked was before I went to college and he had only begun puberty.
We went in and he had the biggest cock that I've ever seen. It was about 8 1/2 inches long, hairy and uncut. Mine is about 7 1/2 inches, and I'm also uncut. We were swimming for a while. Every chance that I got I tried to see his cock or his tight ass. Then after about 45 minutes he said, 'I am going to take a shower.'
Then I told him, 'I'll take one after you.'
He said, 'Why don't you take one with me?'
I said, 'Sure.'
When we were in the hot steamy shower together, he told me, 'I really need to masturbate.'
I said, 'Go ahead. I will do the same.' So we both started to masturbate. We came all over each other at about the same time. We cleaned each other off and got out. Then I told him, 'I have some porno in my room. Let's go look at it.' We looked at the same one and masturbated side by side.